Makefile build doesn't install olm_export.h
Recently the olm_export.h include file has been added to the repo. The CmakeList.txt file has been updated to install this file in this commit: 4fb723ca.
The Makefile build has not been updated resulting in a incomplete install of the header files. This means that building libs (python-olm mainly) that depend on libolm will fail on systems whit such an install.
The olm_export.h file likely just needs to be listed in the PUBLIC_HEADERS variable of the Makefile.
We may want to ponder removing the Makefile build considering that it doesn't seem to be widely used and it'll likely bitrot again.
Related issues: